 /*******************************************************************************
  * Copyright (c) 2005, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.views.markers.internal;

 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.swt.graphics.Image;

 /**
  * FieldCategory is the field for showing categories of markers.
  *
  */
 public class FieldCategory extends AbstractField {

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.views.markers.internal.IField#getDescription()
      */
     public String getDescription() {
         return MarkerMessages.description_type;
     }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.views.markers.internal.IField#getDescriptionImage()
      */
     public Image getDescriptionImage() {
         return null;
     }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.views.markers.internal.IField#getColumnHeaderText()
      */
     public String getColumnHeaderText() {
         return getDescription();
     }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.views.markers.internal.IField#getColumnHeaderImage()
      */
     public Image getColumnHeaderImage() {
         return null;
     }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.views.markers.internal.IField#getValue(java.lang.Object)
      */
     public String getValue(Object obj) {

         if (obj instanceof ConcreteMarker) {
             ConcreteMarker marker = (ConcreteMarker) obj;

             if (marker.getGroup() == null) {
                 if (!marker.getMarker().exists())
                     return MarkerMessages.FieldCategory_Uncategorized;
                 String groupName = MarkerSupportRegistry.getInstance()
                         .getCategory(marker.getMarker());
                 if (groupName == null) {

                     String typeId;
                     try {
                         typeId = marker.getMarker().getType();
                     } catch (CoreException e) {
                         Util.log(e);
                         return MarkerMessages.FieldCategory_Uncategorized;
                     }
                     MarkerType type = MarkerTypesModel.getInstance().getType(
                             typeId);
                     groupName = type.getLabel();
                 }
                 marker.setGroup(groupName);
             }

             return (String ) marker.getGroup();

         }
         return Util.EMPTY_STRING;
     }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.views.markers.internal.IField#getImage(java.lang.Object)
      */
     public Image getImage(Object obj) {
         return null;
     }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.views.markers.internal.IField#compare(java.lang.Object,
      * java.lang.Object)
      */
     public int compare(Object obj1, Object obj2) {
         return getValue(obj1).compareTo(getValue(obj2));
     }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.views.markers.internal.IField#getDefaultDirection()
      */
     public int getDefaultDirection() {
         return TableComparator.ASCENDING;
     }

     /*
      * (non-Javadoc)
      *
      * @see org.eclipse.ui.views.markers.internal.IField#getPreferredWidth()
      */
     public int getPreferredWidth() {
         return 200;
     }

 }

